Transit times for Jupiter's Great Red Spot from September through December 2009 in Universal Time are listed below.

The predictions assume the Red Spot is at Jovian System II longitude 138°, based on observations in August 2009. If the GRS has moved elsewhere, it will transit 1 2/3 minutes late for every 1° of longitude greater than 138° or 1 2/3 minutes early for every 1° less than 138°.

Features on Jupiter appear closer to the central meridian than to the limb — and thus are well placed for viewing — for 50 minutes before and after their transit times.

Red Spot Transits in 2009

September 1: 0:13, 10:09, 20:04; 2: 6:00, 15:56; 3: 1:51, 11:47, 21:42; 4: 7:38, 17:34; 5: 3:29, 13:25, 23:21; 6: 9:16, 19:12; 7: 5:07, 15:03; 8: 0:59, 10:54, 20:50; 9: 6:46, 16:41; 10: 2:37, 12:32, 22:28; 11: 8:24, 18:19; 12: 4:15, 14:11; 13: 0:06, 10:02, 19:58; 14: 5:53, 15:49; 15: 1:45, 11:40, 21:36; 16: 7:31, 17:27; 17: 3:23, 13:18, 23:14; 18: 9:10, 19:05; 19: 5:01, 14:57; 20: 0:52, 10:48, 20:44; 21: 6:39, 16:35; 22: 2:31, 12:26, 22:22; 23: 8:18, 18:13; 24: 4:09, 14:05; 25: 0:00, 9:56, 19:52; 26: 5:47, 15:43; 27: 1:39, 11:34, 21:30; 28: 7:26, 17:21; 29: 3:17, 13:13, 23:09; 30: 9:04, 19:00

October 1: 4:56, 14:51; 2: 0:47, 10:43, 20:38; 3: 6:34, 16:30; 4: 2:25, 12:21, 22:17; 5: 8:13, 18:08; 6: 4:04, 14:00, 23:55; 7: 9:51, 19:47; 8: 5:42, 15:38; 9: 1:34, 11:30, 21:25; 10: 7:21, 17:17; 11: 3:13, 13:08, 23:04; 12: 9:00, 18:55; 13: 4:51, 14:47; 14: 0:43, 10:38, 20:34; 15: 6:30, 16:25; 16: 2:21, 12:17, 22:13; 17: 8:08, 18:04; 18: 4:00, 13:56, 23:51; 19: 9:47, 19:43; 20: 5:39, 15:34; 21: 1:30, 11:26, 21:22; 22: 7:17, 17:13; 23: 3:09, 13:05, 23:00; 24: 8:56, 18:52; 25: 4:48, 14:43; 26: 0:39, 10:35, 20:31; 27: 6:26, 16:22; 28: 2:18, 12:14, 22:09; 29: 8:05, 18:01; 30: 3:57, 13:53, 23:48; 31: 9:44, 19:40

November 1: 5:36, 15:31; 2: 1:27, 11:23, 21:19; 3: 7:14, 17:10; 4: 3:06, 13:02, 22:58; 5: 8:53, 18:49; 6: 4:45, 14:41; 7: 0:36, 10:32, 20:28; 8: 6:24, 16:20; 9: 2:15, 12:11, 22:07; 10: 8:03, 17:59; 11: 3:54, 13:50, 23:46; 12: 9:42, 19:38; 13: 5:33, 15:29; 14: 1:25, 11:21, 21:17; 15: 7:12, 17:08; 16: 3:04, 13:00, 22:56; 17: 8:51, 18:47; 18: 4:43, 14:39; 19: 0:35, 10:30, 20:26; 20: 6:22, 16:18; 21: 2:14, 12:10, 22:05; 22: 8:01, 17:57; 23: 3:53, 13:49, 23:44; 24: 9:40, 19:36; 25: 5:32, 15:28; 26: 1:23, 11:19, 21:15; 27: 7:11, 17:07; 28: 3:03, 12:58, 22:54; 29: 8:50, 18:46; 30: 4:42, 14:38

December 1: 0:33, 10:29, 20:25; 2: 6:21, 16:17; 3: 2:13, 12:08, 22:04; 4: 8:00, 17:56; 5: 3:52, 13:48, 23:43; 6: 9:39, 19:35; 7: 5:31, 15:27; 8: 1:22, 11:18, 21:14; 9: 7:10, 17:06; 10: 3:02, 12:58, 22:53; 11: 8:49, 18:45; 12: 4:41, 14:37; 13: 0:33, 10:28, 20:24; 14: 6:20, 16:16; 15: 2:12, 12:08, 22:03; 16: 7:59, 17:55; 17: 3:51, 13:47, 23:43; 18: 9:39, 19:34; 19: 5:30, 15:26; 20: 1:22, 11:18, 21:14; 21: 7:09, 17:05; 22: 3:01, 12:57, 22:53; 23: 8:49, 18:45; 24: 4:40, 14:36; 25: 0:32, 10:28, 20:24; 26: 6:20, 16:16; 27: 2:11, 12:07, 22:03; 28: 7:59, 17:55; 29: 3:51, 13:46, 23:42; 30: 9:38, 19:34; 31: 5:30, 15:26